Streptocarpus sounds like a nice plant - related to Saintpaulia, takes similar care, bigger leaves, bigger flowers - but I find them really frustrating, and 'Tanager' is the most frustrating cultivar of the four we had at work this year. They flowered a little bit in the spring, then stopped for the summer (too busy rotting, apparently), then finally came back and started to flower again now, in October and November, which is only six or seven months too late to sell. I'd bought one in March, because the color was pretty and the plant had buds on it, but once I got it home, all the buds dropped off.
That was okay, I rationalized, because they'd been moved. It was probably traumatic. They'd be back.
They weren't. The plant barely even grew any leaves until like September.
And now not only flowers, but four spikes' worth of flowers. I guess it sometimes pays to be patient?
All the same, they're better on paper than they are in person. We cut the order for next year in half, and 'Tanager' didn't get a re-invite. Too flower-shy and rot-prone. Plus, when trying to sell plants to people as outdoor annuals, one really needs to try to choose plants that like to be outdoors: I never got the impression that any of our Streptocarpus cared for it that much.